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MB3771 - Power Supply Monitor

Datasheet Summary

Description

The Fujitsu MB3771 is designed to monitor the voltage level of one or two power supplies (+5 V and an arbitrary voltage) in a microprocessor circuit, memory board in large-size computer, for example.

Features

  • Precision voltage detection (VSA = 4.2 V ± 2.5 %) User selectable threshold level with hysterisis (VSB = 1.23 V ± 1.5 %) Monitors the voltage of one or two power supplies (5 V and an arbitrary voltage, >1.23 V) Usable as over voltage detector Low voltage output for reset signal (VCC = 0.8 V typ. ) Minimal number of external components (one capacitor min. ) Low power dissipation (ICC = 0.35 mA typ. , VCC = 5 V).

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Datasheet Details

Part number MB3771
Manufacturer Fujitsu
File Size 183.82 KB
Description Power Supply Monitor
Datasheet download datasheet MB3771 Datasheet
Additional preview pages of the MB3771 datasheet.

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Full PDF Text Transcription

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FUJITSU SEMICONDUCTOR DATA SHEET DS04-27400-7E ASSP For power supply applications BIPOLAR Power Supply Monitor MB3771 s DESCRIPTION The Fujitsu MB3771 is designed to monitor the voltage level of one or two power supplies (+5 V and an arbitrary voltage) in a microprocessor circuit, memory board in large-size computer, for example. If the circuit’s power supply deviates more than a specified amount, then the MB3771 generates a reset signal to the microprocessor. Thus, the computer data is protected from accidental erasure. Using the MB3771 requires few external components. To monitor only a +5 V supply, the MB3771 requires the connection of one external capacitor. The level of an arbitrary detection voltage is determined by two external resistors.
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